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Title: The quantum nature of skyrmions and half-skyrmions in Cu2OSeO3
Authors: Janson, Oleg
Rousochatzakis, Ioannis
Tsirlin, Alexander A.
Belesi, M.
Leonov, Andrei A.
Roessler, Ulrich K.
van den Brink, Jeroen
Rosner, Helge
Issue Date: 2014
Publisher: © Macmillan Publishers Limited
Citation: JANSON, O. ... et al, 2014. The quantum nature of skyrmions and half-skyrmions in Cu2OSeO3. Nature Communications, 5, Article number 5376.
Abstract: The Skyrme-particle, the skyrmion, was introduced over half a century ago in the context of dense nuclear matter. But with skyrmions being mathematical objects -special types of topological solitons -they can emerge in much broader contexts. Recently skyrmions were observed in helimagnets, forming nanoscale spin-textures. Extending over length scales much larger than the interatomic spacing, they behave as large, classical objects, yet deep inside they are of quantum nature. Penetrating into their microscopic roots requires a multi-scale approach, spanning the full quantum to classical domain. Here, we achieve this for the first time in the skyrmionic Mott insulator Cu 2 OSeO 3. We show that its magnetic building blocks are strongly fluctuating Cu 4 tetrahedra, spawning a continuum theory that culminates in 51a ‰nm large skyrmions, in striking agreement with experiment. One of the further predictions that ensues is the temperature-dependent decay of skyrmions into half-skyrmions.
Description: This paper is closed access.
Version: Published
DOI: 10.1038/ncomms6376
URI: https://dspace.lboro.ac.uk/2134/34358
Publisher Link: https://doi.org/10.1038/ncomms6376
Appears in Collections:Closed Access (Physics)

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